Motor propelled cultivator



sept. 24J, 1935. L DU'FOUR mam MOTOR PROPELLED CULTIVATOF Filed not. 13,1954 5 sheets-shea; 1

x /NVENTOR Sept. 24, 1935'. 1 DUFQUR 2,015,2Y8

4 MOTOR PROPELLED CULTIVTOR Filed oct. 15, 1934 A s sheets-snee: 2

: rl f6 fz, "v l ff@ f@ x ,f/ 'f2 L x Ww-TLm* 3j 23 I f5 2% la 'l ofocuf/NVEA/Ta/ sept. 24, 1935.

L. DUFOUR 2,015,218

MOTOR PROPELLED CULTIVATOR Filed Oct. 13, 1934 3 Sheets-Sheet 3 PatentedSept. 24, 1935 lo :mf:

vv4 cigno-14:1

' The present invention relatesto'motor fpropelled cultivatorsor smalltractors, and particu larlyto change speed gears adapted foruse'withsuch cultivators or tractors, and co'nstitutes'fan 5 improvementon the device disclosedin myprior U. S. Patent Specification No.-`1,975,4l7. y f The change speed gear disclosed-inthe said; patentcomprises two coupling "sleeves loosely mounted on the driving axle ofthe tractor' -to which are keyed the t-wo tractionzwheels, each of saidjtwo sleeves being disposed adjacentato. the hub of one of the' tractionwheelsand being continuously yconnected to the motor of the trac torwhich 4drives them at different speeds, while'l coupling means areprovided forselectivelyicou-i pling one or the other of the sleeves toits ad. jacent wheel lhub to make the tractormove' at a slower or at afaster speed.k a

A The object of the present invention is the pro..

vision of a change speed gear for motorprapelled cultivators or smalltractors of theabove type in which both coupling sleeves are disposedadjacent to the same traction wheel so that the change of speed can beeffected from one side of the tractor only, it being not necessary,after disengaging one wheel from one ofthe coupling sleeves, to go onthe other side of the tractor for engaging the second traction wheelwith the other coupling sleeve. A

Another object is the provision of a differential gear for transmittingthe speedv from the coupling sleeves to the traction wheels.. Theinvention consists in the construction, ar-

agement and combination of the various parts iii-he device, ashereinafter more fully set forth,

" pointed out 1n the claims, and illustrated mine accompanying drawings,in which:

'Figure 1 is a side elevation of a driving unit of a cultivator or smalltractor according to the 40 invention, partly drawn in longitudinalsection.

Figure 2 is a plan view of the driving unit,

partly drawn in horizontal section through the axis oi the tractionwheels.

Figure 3 shows a modification of a detail of the change speed controldevice.

Figure 4 is a horizontal section along the driving axle oi a modifieddriving unit comprising a dlierential gear for transmission of movementto the traction wheels.

The driving unit represented in Figures 1 and 2 comprises an internalcombustion motor i0 having a cylinder ii and a cooler i2,

The motor shaft I3 is connected to one part i4 of a. friction clutch theother part i5 of which is slidably mounted on an intermediate shaft i6extending iin fra;..;.gearl casing. L., actuating means.for-'thefriction;clutch,lbei!!,Se Qi-:conventional design, are not shown. TheshaftA i6 carries a worm gear; il--and `its l rearend is providedwithaif'parti'i.l .of;.a claw coupling-,forming a l power takeeoii rior.theficultivating .toolsyjlhe worm gear transmits moyement; from-themotor tothe .driving axle,v awhile:h the coupling.- part` 9. transmitsmovement' ,to a-,theq ultiva tng tools -whichlmayibesecured toltherearof, thedrivins l0 unit; such. as rotaryetilling putters.; mowers. 0r.o.ther,too1s...;mhe represented;-drivins unit may however -be used as.;tractor. ,only {or}A milling a p1ow..orother i1nplenf1e-nlis 1111 whichcasejithe con:v plingfpartf-is wouldznotm-fuedft f'lheememher. 15zoemayfthus.- indicate e. Plon. carrier-ss me' 'as thecentral'rarmfoilrotatytllling $90155... ...The .worm-f isdrives-.anomali l t l'serrled by a Shultz: m-whmh are steunde ,Smellpinion :sand sweater-simon.;Zifalrbe driving, axle 131 20 has. keyedthereon theghuhs 3.2 and. or the two traction wheels 34 and 35'. Asleeve 36 is'loosely mounted on the axle, 8 L and .asecondsleeve 43l1s.looseiy-mounted..0nf the;-.rS,-S1.vz:.3f ...The

sleeve 31, is rigid. with e tvp-.couplingy disk. 3 8', and 25 the sleeveisrisid.withlafcouplingdisk 1 9 of smaller diameter. than `the r iisk.l38. s, .two disks. are-situated adjacent the hub 33 of the tractionwheel 35. A gear wheel 40 is keyed the sleeve .3Q and constantly mesheswith the. pinion 30 24` securedf.to the :shaft-.22, while, a,l secondgear wheel M is keyed .tothe sleeve@t andconstantly mesheswithfthepinioneon--thh-fb-22- The coupling disk 38. is provided ,with Aa series,of holes 42 and the, disk\,39, ls. likewise provided with holes 35 43..hf-The hub 33,is-,providedwithI ,two .holes 45 and `M5', registering.with :the holesy 1-and 4 2..- .respectively-in the couplllafdlsks and38.1. A coupling bolt 44 can be introduced through the hole 46 and oneof the holes 42 in the disk 38, or 40 through the hole 45 and one of theholes 43 in the disk 39. In the rst case, as represented in Fig. 2, thebolt 46 connects the wheels hub 33 to the sleeve 31 carrying the wheel4i which is meshing with the smaller pinion 23 on the shaft 22 so that45 upon starting the motor, the tractor moves at slow speed. In order topass to second or fast speed, the bolt 44 is removed from the holes 42and 46 and introduced into the hole 45 of the wheel hub and the hole 43of the disk 39. The 50 wheel hub is then connected to the sleeve 36'carrying the gear wheel 40 which meshes with the larger pinion on theshaft 2-2. It will thus be seen that the speed of the tractor can bechanged by the operator from one side of the tractor 55 by singlypulling the bolt 44 out of two registering holes in the traction wheelhub and an adjacent coupling disk and introducing this bolt into twoother registering holes in the hub and in a second adjacent couplingdisk.

Figure 3 shows a modified operating means for effecting the change ofspeed. Two loose sleeves land 31' carry each a coupling disk 39' and38', respectively, which have the same diameter and have theirperipheries provided with teeth or claws 48. A bracket 41 is rigid withthe hub 33 of the traction wheel and carries a rotatable bolt member 49provided with two teeth 50 and 5|. The bolt member 49 cansbe broughtinto either of three positions a, b, or c. In the represented positiona, the tooth 50 is engaging between two teeth 48 of the disk 39. In theposition b the bolt is engaging neither of the disks 38 or 38' and nomovement is transmitted to the wheel hub 33. In the position c the tooth5i is engaging the disk 38' and the speed of the sleeve 31' istransmitted to the wheel hub.

In the modification according to Fig. 4 the motor of the tractor isagain continuously connected to the gear wheels 48 and 4l keyed to thesleeves 36" and 31" respectively, which are rigid with coupling disks39" and 38" respectively. Between these disks and the hub 33 of thetraction wheel 35 there is mounted, on the driving axle 3|, adifferential gear for transmitting the movement from the disks to theshaft. This differential gear comprises a casing 52 carrying thesatellite wheels 5I. The casing 52 is provided with the bracket 41 onwhich is mounted the bolt 49 which can lock one or the other of the twodisks 38, 39", to the casing 52. The' bevel sun gear 54 of thedinerential is keyed to the driving axle 3| to which is also keyed thehub 32 of the traction wheel 34. The other bevelwheel 55 is loose on thedriving axle, but .rigid with-the hub 33 of the traction w/heel35.

f' Precisely owing to the fact that the two cou- 'pling disks aredisposed adjacent to each other and on the same side of the tractor, itis possible to provide a differential gear on this same side fortransmitting movement from the motor actuated sleeves to the tractionwheels of the cultivator.

I claim:

1. In a change speed gear for motor propelled cultivators or smalltractor having two traction wheels, a driving axle connecting the twowheels, two sleeves freely rotatable on said axle intermediate the twotraction wheels, one of the sleeves being loosely mounted within theother sleeve, one of the ends of each sleeve being provided with acoupling disk, the two disks being situated adjacent to each other andto the wheel hub of one of the traction wheels, means for selectivelycoupling one or the other of said disks to said wheel hub, a motoractuated drive shaft, and two trains of continuously meshing gear wheelshaving different transmission ratios for operatively 5 connecting thedrive shaft to both said sleeves.

2. A motor propelled cultivator or small tractor having two tractionwheels, a driving axle connecting the two wheels, a sleeve freelyturning on the driving axle, a second sleeve freely turning 10 on saidfirst sleeve, each sleeve carrying a toothed coupling disk, a pivotedbolt member mounted for rotation with the driving axle and coactlng withthe teeth of said coupling disks for selectively locking one or theother of said disks to the drivl5 ing axle, a motor actuated driveshaft, and two trains of continuously meshing gear wheels havingdifferent transmission ratios for operatively connecting the drive shaftto both said sleeves.

3. In combination, a driving axle for motor 20 propelled vehicles, twotraction wheels mounted on said. axle, a sleeve freely turning on saidaxle intermediate of the two wheels, a second sleeve freely turning onthe first sleeve, adjacent ends of said two sleeves being each providedwith a cou- 25 pling disk, a differential gear mounted on the drivingaxle intermediate said disks and one of the traction wheels, saiddifferential gear includingv a satellite wheel carrier rotatable aboutthe driving axle, means for selectively coupling one orvthe other ofsaid-disks to said satellite wheel carrier, a motor. actuated driveshaft, and two trains of continuously meshing gear wheels havingdifferent transmission ratios for operatively connecting the drive shaftto both said wheels. :l 4. In combination, a driving -axle for motorpropelled vehicles, two traction wheels mounted on said'axle, a sleevefreely turning on the axle intermediate the two wheels. a second sleevefreely turning on the ilrst sleeve,.two adjacent ends of 40 said twosleeves being each provided with a couplingdisk, a differential gearmounted on the driving axle intermediate said disks and one of thetraction wheels, said differential gear comprising a satellite wheelcarrier rotatable about the driving axle, and two bevel sun wheels, oneof said sun wheels being keyed to the driving axle having one of thetraction wheels keyed thereto, the other sun wheel being keyed to thesecond traction wheel which is loose relative to the driving axle, meansfor selectively locking one or the otherof said coupling disks to saidsatellite wheel carrier. a motor actuated drive shaft, and two trains ofcontinuously meshing gear wheels having different transmission ratios 55for connecting the drive shaft to both said sleeves.

LoN DUFOUR.

